In 2001, Corcoran sold that same business, The Corcoran Group, for $66M. The company is now valued at around $6B.

It's safe to say that Barbara's advice is advice we would definitely trust. Here are some of the best words of wisdom on her own experience in business and her career.

1. "If you want to be noticed, dress the part."

The way in which we present ourselves to the world, especially to our colleagues and professional environment, is a way of inadvertently telling people how seriously we take our job and the level of respect we want to be treated with. If we don't present ourselves professionally or take ourselves seriously, why should any of our colleagues?

Plus, dressing well and putting effort into our appearance helps us feel more confident and ready for whatever the workday has to throw at us. If you look your best and feel your best, you'll perform your best.

2. "Don't you dare underestimate the power of your own instinct."

Trust your gut, follow your heart; whichever way you put it, it's important to listen to your instinct. Sometimes, whether in business or in our personal lives, our sixth-sense can pick up on something before our brain has time to catch up.

If something inside is telling you to make a career jump, start a new project, or even leave a job where you are unhappy, don't let that go unaddressed. You know more than you think you do.

The things that you want the most out of your career are more than likely not going to just land in your lap.

But if you want something badly enough, like a promotion or a new deal to go through, you have to believe that it's possible and more importantly, that you can achieve it if you work towards it.

There's always a way to get to the places we want to go to if we're flexible about how we get there.

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4. "People want to do business with someone they like. If people like you, they're going to want to do business with you. And if they don't you're going to have an almost insurmountable obstacle to overcome."

It doesn't matter how brilliant, experienced or talented you are if you can't work well with other people, period. Your entire career will consist of constant collaboration with others.

Regardless of your career field or position, our professional lives will inevitably be stressful at times. Nobody wants to willingly work with somebody who increases that stress level, or makes his or her life more difficult. Flexibility and cooperation over controversy will get you farther than any degree will.

5. "I've since learned that you need to treat obstacles just like opportunity -- quickly without much thought and move on."

We have to learn to let go of failures, no matter how big or how small, if we ever want to move forward in our careers. If moving up and ahead was simple, we would never feel true success. We need to make mistakes, to pick the wrong job (or two, or three), to feel challenged and to doubt ourselves. All of this is what makes the successes in our career that much better.

If you can approach all of the "no's" you get as stepping stones to take you to where you ultimately want and are meant to be, then you put the power of your career back in your hands.

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6. "The best time to expand is when people are asleep at the wheel."

Successful companies (and people) tend to get complacent (or even lazy) when they're doing well. The most opportune time for you to fine tune your skills and show off what you've learned and perfected is when other people are just coasting through their routines and workdays.

In business as a whole, the best time to attack your market and rev things up is when other business are coasting and complacent. You'll know when the time is right.

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